Rafter attachment for steel squares.



No 795,160. PATENTBD JULY 18, 1905.

M. NIGHOLLS.

RAFTER ATTACHMENT FOR STEEL SQUARBS.

APPLIUATION FILED SEPT. 26.1904.

off/gsi? W. f@ 57l No. 795,160. Patenten Jury 1e, 1905.

UNITED STATES PATENT OFFICE.

MOSES NIOHOLLS, OF OTTUMVVA, IOVV'A` ASSIGNOR OF THREE-FOUltTHS TO J. I). GRAY, OF OTTUMVVA, IOWA.

RAFTER ATTACHMENT FOR STEEL SQUARES.

SPECIFICATION forming part of Letters Patent No. 7 95,160, dated July 18, 1905.

Application filed September 26, 1904, Serial No. 225,943.

T 01H wbOm 75 "my @UWJGWW and one-quarter inchand the slot in the clip 5o Be it known that I, Moses NIcHoLLs, a citi- 16 is made to receive the wider tongue. In zen 0i' the United States of America, and a the event that the clip 16 is employed on a resident of Ottumwa, Wapello county, Iowa, narrower tongue a plate or strip 19 is mounted have invented anew and useful Rafter Attachbetween the inner end of the slot 17 and the ment for Steel Squares, of which the followinner margin of the tongue. A set-screw 20 55 ing is a specification. is mounted in and longitudinally of the inner The object of this invention is to provide an end portion of the clip 16 and engages the inattachment for use on a steel square whereby ner margin of the tongue 18 or the strip 19 IO the desired length of rafters, hip-rafters, valand locks the clip to the tongue. The bar 15 ley-rafters, and the various cuts thereotl may preferably is Jformed with a longitudinal slot 6o be ascertained without computation. 21, and a bolt 22 is seated in the clip 16 and My invention consists in the construction, extends through said slot. A washer 23 is arrangement, and combination of elements mounted on the bolt 22 and is formed with an I5 hereinafter set Forth, pointed out in my claims, index or pointer 211, projecting from its rim,

and illustrated by the accompanying drawandatightening-nut 25 is screwed on the outer 65 ings, in whichend portion of the bolt and impinges the Figure 1 is a plan illustrating' the construcwasher and binds the ba'r 15 tothe clip 16. tion and use ot' my improved device. Fig. 2 The face of the square is graduated on its 2O is a cross-section on the indicated line 2 2 of outer margin to inches and twelfths ot' inches,

Fig. 1. Fig. 3 is a cross-section on the indiand the bar 15 is graduated on its outer mar- 7o cated line I) 3 ot' Fig. 1. Figs. 2 and 3 are magin to inches and twenty-fourths oi' inches. terially enlarged. In use to {ind the length of af common raliln the construction ol the device as shown ter the clip 1() is locked on the blade, with the 25 the numeral 1() designates a clip which is forward margin (tone-haltinch in advance olf formed with a longitudinal slot 11, adapted to the run indicated on the blade 12, thus bring- 75 admit and slidingly engage the blade 12 of a ing the center of the stud 14 and the axis of steel square of ordinary construction. A setoscillation of the bar 15 over the indication screw 13 is mounted in and longitudinally ot' of the run. The clip 16 is moved along the one end portion of the clip 10 and is adapted tongue 18 until the pointer 2 4, indicates the to engage the inner margin of the blade 12 rise in the blade and is locked by tightening 8o and lock the clip thereto. The end of the clip the set-screw 20 and the nut 25. 'lhe point 10 opposite to the set-screw 13 is curved on on the graduation of the bar 15 indicated by halt' et' a circle of the width of the clip (dotted the pointer 24 will show the length of the 3 5 lines, Fig. 1)and projects beyond themargin of common rafter, and by placing the bar 15 the su nare-blade theamountotl its radius. The against one side ol the stick being' framed the 8 5 clip 1,0 is preferably exactly one inch in width. outer margin of the blade will show the an- A stud 14 is formed on and projects from the gle of the top cut, and the outer margin of Vlace oi' the clip near its outer end, and the centhe tongue will show the angle of the bottom 40 ter of said stud is coincident-witl'l the axis of eut, of the rafter. Taking the length ol the the adjacent rounded end of the clip. A bar common rafter and the run on the tongue and 15 is provided and is rounded on a half-circle blade. respectively, and the bar, properly adat one end and pivoted by a central aperture justed again, will indicate the length ot' hip in said rounded end engaging and embracing' or valley rafter. As adjusted to show the 45 the stud 14. A clip 16 is formed with a lonlength of the hip or valley rafter the angles gitudinal slot 17, adapted to admit and slidof the bar to the tongue and blade may be ingly engage the tongue 18 of the square. used as a base and a bevel-square used to de- The tongue 18is ordinarily made of one o't'two termine the side cuts ot' the hip or valley widths-namely, one'and one-half inch or one rafter.

I claim as my inventionl. The combination with a steel square of a clip mounted on and adjustable longitudinally of the blade thereof, the outer end portion of said clip curved on a half-circle of the width of the clip, a stud on said clip, the center of the stud coincident witli the axis of the rounded outer end portion of the clip, a graduated bar pivoted on said stud, a clip mounted on and adjustable longitudinally of the tongue of the square and sliding connections between the latter clip and said bar.

2. The combination with a steel square of clips mounted adj'ustably on the blade and tongue thereof, a bar pivoted on the clip on the blade and formed with a longitudinal slot, a bolt mounted in the clip on the tongue and projecting through the slot of the bar, a washer on said bolt and adapted to bind the bar to said clip, said washer formed with a pointer adapted to indicate graduation-marks on the bar and tongue, and a nut on the outer end of said bolt and impinging said washer.

'veaieo 3. The combination with a steel square, of a clip formed with a slot to receive the blade of said square, the outer end portion of said clip rounded on 'a half-circle having its axis coincident with the outer margin of the square and midway of the side margin of the clip, a stud on said clip, the center-of the stud coincident with the axis of the rounded outer end portion of the clip and the outer margin of the blade, a clip mounted on and adjustable longitudinally of the tongue of the square, a graduated bar pivoted at one end on the stud and formed with a longitudinal slot, and a fastening device on the second clip and extending through the slot in the bar, the fastening device provided with a pointer indicating graduating-marks on the bar.

Signed by me at Ottumwa, Iowa, this 9th day of May, 1904.

MOSES NICHOLLS. Witnesses:

W. W. VEBSTER, C. MYERS. 

